refactor: implement MiniScoringServiceImpl

Phase 1, Step 1.3.2: Extract scoring logic from controller
- Move submitScore business logic to service layer
- Add parseLong helper method
- Placeholder for score calculation (to be extracted later)

Related to Phase 1 refactoring plan

src/main/java/org/springblade/modules/martial/service/impl/MiniScoringServiceImpl.java

@@ -0,0 +1,90 @@
+package org.springblade.modules.martial.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springblade.core.tool.api.R;
+import org.springblade.modules.martial.pojo.dto.MiniScoreSubmitDTO;
+import org.springblade.modules.martial.pojo.entity.MartialAthlete;
+import org.springblade.modules.martial.pojo.entity.MartialJudge;
+import org.springblade.modules.martial.pojo.entity.MartialScore;
+import org.springblade.modules.martial.service.IMartialAthleteService;
+import org.springblade.modules.martial.service.IMartialJudgeService;
+import org.springblade.modules.martial.service.IMartialScoreService;
+import org.springblade.modules.martial.service.IMiniScoringService;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class MiniScoringServiceImpl implements IMiniScoringService {
+
+    private final IMartialScoreService scoreService;
+    private final IMartialJudgeService judgeService;
+    private final IMartialAthleteService athleteService;
+
+    @Override
+    public R<String> submitScore(MiniScoreSubmitDTO dto) {
+        MartialScore score = new MartialScore();
+        
+        score.setAthleteId(parseLong(dto.getAthleteId()));
+        score.setJudgeId(parseLong(dto.getJudgeId()));
+        score.setScore(dto.getScore());
+        score.setProjectId(parseLong(dto.getProjectId()));
+        score.setCompetitionId(parseLong(dto.getCompetitionId()));
+        score.setVenueId(parseLong(dto.getVenueId()));
+        score.setScheduleId(parseLong(dto.getScheduleId()));
+        score.setNote(dto.getNote());
+        score.setScoreTime(LocalDateTime.now());
+
+        if (dto.getDeductions() != null && !dto.getDeductions().isEmpty()) {
+            List<Long> deductionIds = dto.getDeductions().stream()
+                .map(this::parseLong)
+                .filter(id -> id != null)
+                .collect(Collectors.toList());
+            score.setDeductionItems(com.alibaba.fastjson.JSON.toJSONString(deductionIds));
+        }
+
+        Long judgeId = parseLong(dto.getJudgeId());
+        if (judgeId != null) {
+            MartialJudge judge = judgeService.getById(judgeId);
+            if (judge != null) {
+                score.setJudgeName(judge.getName());
+            }
+        }
+
+        boolean success = scoreService.save(score);
+        
+        if (success) {
+            Long athleteId = parseLong(dto.getAthleteId());
+            Long projectId = parseLong(dto.getProjectId());
+            Long venueId = parseLong(dto.getVenueId());
+            if (athleteId != null && projectId != null) {
+                updateAthleteTotalScore(athleteId, projectId, venueId);
+            }
+        }
+        
+        return success ? R.success("评分提交成功") : R.fail("评分提交失败");
+    }
+
+    private void updateAthleteTotalScore(Long athleteId, Long projectId, Long venueId) {
+        // TODO: Implement score calculation logic
+        // This will be extracted to a separate service in later refactoring
+    }
+
+    private Long parseLong(String str) {
+        if (str == null || str.trim().isEmpty()) {
+            return null;
+        }
+        try {
+            return Long.parseLong(str);
+        } catch (NumberFormatException e) {
+            log.warn("Failed to parse long: {}", str);
+            return null;
+        }
+    }
+}